Plaster ring



FIG. 1 is a front view of a plaster ring in accordance with the present design;

FIG. 2 is a rear view of the plaster ring shown in FIG. 1;

FIG. 3 is a top view of the plaster ring shown in FIG. 1;

FIG. 4 is a bottom view of the plaster ring shown in FIG. 1;

FIG. 5 is a left side view of the plaster ring shown in FIG. 1;

FIG. 6 is a right side view of the plaster ring shown in FIG. 1;

FIG. 7 is a front view of a second embodiment of a plaster ring in accordance with the present design;

FIG. 8 is a rear view of the plaster ring shown in FIG. 7;

FIG. 9 is a top view of the plaster ring shown in FIG. 7;

FIG. 10 is a bottom view of the plaster ring shown in FIG. 7;

FIG. 11 is a left side view of the plaster ring shown in FIG. 7; and,

FIG. 12 is a right side view of the plaster ring shown in FIG. 7.

The broken lines shown represent unclaimed subject matter and form no part of the claimed design. 

CLAIM The ornamental design for a plaster ring, as shown and described. 